# Processing

**URL:** https://discourse.processing.org/c/processing/6.md?no_subcategories=false&page=173

[Latest](https://discourse.processing.org/latest.md) · [Categories](https://discourse.processing.org/categories.md) · [Tags](https://discourse.processing.org/tags.md)

**Page:** 174

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## [Processing on Microcontrollers?(Teensy, Arduino, etc.)](https://discourse.processing.org/t/processing-on-microcontrollers-teensy-arduino-etc/24962)

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**Author:** [@onionwasabi](https://discourse.processing.org/u/onionwasabi)\
**Replies:** 5\
**Last updated:** [October 30, 2020, 9:47am UTC](https://discourse.processing.org/t/processing-on-microcontrollers-teensy-arduino-etc/24962 "2020-10-30T09:47:34Z")

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Hi everyone. I am pretty sure there is a similar question but I couldn’t find the answer I want. Sorry if this is redundant. (I am a noob, still learning) My Question: Is there any way to run Processing on Microcontrol…

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## [I feel like this is bad practice but I'm not sure why](https://discourse.processing.org/t/i-feel-like-this-is-bad-practice-but-im-not-sure-why/24937)

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**Author:** [@wyattsworlddd](https://discourse.processing.org/u/wyattsworlddd)\
**Replies:** 9\
**Last updated:** [October 30, 2020, 9:36am UTC](https://discourse.processing.org/t/i-feel-like-this-is-bad-practice-but-im-not-sure-why/24937 "2020-10-30T09:36:04Z")

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So this code below works, but I feel like maybe I should be doing something else to be more proper. if (s\<=9){ secs = "0" + s; } else { secs = "" + s; } Really simply, all I’m doing is adding a 0 to the f…

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## [Need to run something after declaring an object](https://discourse.processing.org/t/need-to-run-something-after-declaring-an-object/25038)

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**Author:** [@xX\_pokeman2003\_Xx](https://discourse.processing.org/u/xX_pokeman2003_Xx)\
**Replies:** 2\
**Last updated:** [October 30, 2020, 5:28am UTC](https://discourse.processing.org/t/need-to-run-something-after-declaring-an-object/25038 "2020-10-30T05:28:18Z")

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I’m currently writing a bit of code I want to reuse in other projects. It’s a GUI framework. The problem is that I don’t want to constantly keep typing in a specific line of code every single time I start using whatever …

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## [Controlp5 - Multiple buttons that use one function](https://discourse.processing.org/t/controlp5-multiple-buttons-that-use-one-function/4638)

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**Author:** [@Zac-04](https://discourse.processing.org/u/Zac-04)\
**Replies:** 12\
**Last updated:** [October 30, 2020, 3:40am UTC](https://discourse.processing.org/t/controlp5-multiple-buttons-that-use-one-function/4638 "2020-10-30T03:40:38Z")

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So let’s say I had a class that’s display was a button. How would I make it so that all of these classes’ buttons point to one function. e.g. //In my class: button = cp5.addButton("doThis"); //global scope: void doTh…

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## [I need help with my game (snake game)](https://discourse.processing.org/t/i-need-help-with-my-game-snake-game/24984)

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**Author:** [@umar](https://discourse.processing.org/u/umar)\
**Replies:** 9\
**Last updated:** [October 29, 2020, 11:44pm UTC](https://discourse.processing.org/t/i-need-help-with-my-game-snake-game/24984 "2020-10-29T23:44:32Z")

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It’s actually a snake game, but with 16 by 8 blocks window size, where yellow is for banana(+10 points), red is for apple(+5 points) and green block is for cameleon(-5 points). The problem I’m facing is that my fruits ar…

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## [Debug to processing pjs from processing 3](https://discourse.processing.org/t/debug-to-processing-pjs-from-processing-3/25004)

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**Author:** [@adrianmc](https://discourse.processing.org/u/adrianmc)\
**Replies:** 4\
**Last updated:** [October 29, 2020, 6:13pm UTC](https://discourse.processing.org/t/debug-to-processing-pjs-from-processing-3/25004 "2020-10-29T18:13:47Z")

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please format code with \</\> button \* homework policy \* asking questions Hi all I’m having a problem trying to upload this code to a website, I understand pjs runs with and older version of processing, however I’m not…

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## [Need some help in creating a simulation](https://discourse.processing.org/t/need-some-help-in-creating-a-simulation/24999)

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**Author:** [@Toninuin](https://discourse.processing.org/u/Toninuin)\
**Replies:** 4\
**Last updated:** [October 29, 2020, 10:02pm UTC](https://discourse.processing.org/t/need-some-help-in-creating-a-simulation/24999 "2020-10-29T22:02:32Z")

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Hey people! I’m really new to processing and programming as a whole and I’m trying to do a simulation of a terrain with pseudo-realistic river flow logic. Its a 2D array with perlin noise that does the trick for the terr…

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## [.lenght function](https://discourse.processing.org/t/lenght-function/25015)

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**Author:** [@moms\_spaghetti](https://discourse.processing.org/u/moms_spaghetti)\
**Replies:** 1\
**Last updated:** [October 29, 2020, 3:56pm UTC](https://discourse.processing.org/t/lenght-function/25015 "2020-10-29T15:56:40Z")

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Hello Am I the only one where the .lenght doesnt work?? String name = “test”; int lenght = name.lenght(); this gives me the error “The function “.lenght()” does not exist” while here https://processing.org/reference…

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## [Moving a picture](https://discourse.processing.org/t/moving-a-picture/25018)

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**Author:** [@AntiQliMax](https://discourse.processing.org/u/AntiQliMax)\
**Replies:** 1\
**Last updated:** [October 29, 2020, 4:02pm UTC](https://discourse.processing.org/t/moving-a-picture/25018 "2020-10-29T16:02:26Z")

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Well at this point i worked a bit further, The goal is that a fish should jump from a random start position to another (hard coded route) to another end point. I know you guys don’t have the pictures and I am sorry for …

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## [How to create button that makes lines of text appear randomly](https://discourse.processing.org/t/how-to-create-button-that-makes-lines-of-text-appear-randomly/25017)

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**Author:** [@dreabirdflies](https://discourse.processing.org/u/dreabirdflies)\
**Replies:** 1\
**Last updated:** [October 29, 2020, 4:00pm UTC](https://discourse.processing.org/t/how-to-create-button-that-makes-lines-of-text-appear-randomly/25017 "2020-10-29T16:00:30Z")

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please format code with \</\> button \* homework policy \* asking questions Wondering how to do this?

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## [Need help with centipede / snake game](https://discourse.processing.org/t/need-help-with-centipede-snake-game/24982)

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**Author:** [@zezo](https://discourse.processing.org/u/zezo)\
**Replies:** 8\
**Last updated:** [October 29, 2020, 3:45pm UTC](https://discourse.processing.org/t/need-help-with-centipede-snake-game/24982 "2020-10-29T15:45:26Z")

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Hello guys! So I’ve been working on a snake game (kind of ) for school recently but I’m kinda stuck on a part. Because I need to add (invisible) pieces of food on screen and when the snake eats it, the snake needs to be…

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## [If statement problems](https://discourse.processing.org/t/if-statement-problems/25012)

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**Author:** [@AntiQliMax](https://discourse.processing.org/u/AntiQliMax)\
**Replies:** 4\
**Last updated:** [October 29, 2020, 1:40pm UTC](https://discourse.processing.org/t/if-statement-problems/25012 "2020-10-29T13:40:52Z")

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Hello, I am new to processing and programming in general, as of a project for school I ran into a problem. The goal is that a random number will be generated, with a click on a the mouse, after that it should go to the …

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## [Saving images from the window](https://discourse.processing.org/t/saving-images-from-the-window/24964)

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**Author:** [@HumanoidX](https://discourse.processing.org/u/HumanoidX)\
**Replies:** 3\
**Last updated:** [October 29, 2020, 1:38am UTC](https://discourse.processing.org/t/saving-images-from-the-window/24964 "2020-10-29T01:38:10Z")

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My question is, what is the difference between save() and saveFrame()? Which one must I use if I want to save, only the drawings inside the windows, not savijng mouse.

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## [Planet Generation](https://discourse.processing.org/t/planet-generation/24966)

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**Author:** [@HumanoidX](https://discourse.processing.org/u/HumanoidX)\
**Replies:** 2\
**Last updated:** [October 29, 2020, 1:37am UTC](https://discourse.processing.org/t/planet-generation/24966 "2020-10-29T01:37:29Z")

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I’m doing a planet generation program. My code: import peasy.\*; PVector resolution = new PVector(200,200); PVector\[\]\[\] basicGlobe = new PVector\[round(resolution.x) + 1\]\[round(resolution.y) + 1\]; float radius = 400; P…

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## [I need help with my snake game](https://discourse.processing.org/t/i-need-help-with-my-snake-game/24986)

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**Author:** [@umar](https://discourse.processing.org/u/umar)\
**Replies:** 2\
**Last updated:** [October 28, 2020, 9:40pm UTC](https://discourse.processing.org/t/i-need-help-with-my-snake-game/24986 "2020-10-28T21:40:33Z")

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but with 16 by 8 blocks window size, where yellow is for banana(+10 points), red is for apple(+5 points) and green block is for cameleon(-5 points). The problem I’m facing is that my fruits are never in the same coordina…

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## [How to use for loop to draw a 9-sided polygon](https://discourse.processing.org/t/how-to-use-for-loop-to-draw-a-9-sided-polygon/24968)

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**Author:** [@mengtong](https://discourse.processing.org/u/mengtong)\
**Replies:** 8\
**Last updated:** [October 28, 2020, 9:42pm UTC](https://discourse.processing.org/t/how-to-use-for-loop-to-draw-a-9-sided-polygon/24968 "2020-10-28T21:42:12Z")

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I am trying to draw a 9-sided polygon, only use for loop, here is my code, but I don’t know what’s wrong with it. int points=9;//9-sided polygon size(600,600);//no setup and draw function float angle=0;//angle start f…

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## [Avoid click audio](https://discourse.processing.org/t/avoid-click-audio/24961)

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**Author:** [@Kompozitorz](https://discourse.processing.org/u/Kompozitorz)\
**Replies:** 5\
**Last updated:** [October 28, 2020, 5:10pm UTC](https://discourse.processing.org/t/avoid-click-audio/24961 "2020-10-28T17:10:57Z")

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Hi! I have create a sketch in which two sound run simultaneously and I can switch between them… the problem is that when I switch between them (using mouse pressed and release) I hear a click. How can I solve the problem…

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## [Calculate something written in a string](https://discourse.processing.org/t/calculate-something-written-in-a-string/24977)

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**Author:** [@NumericPrime](https://discourse.processing.org/u/NumericPrime)\
**Replies:** 2\
**Last updated:** [October 28, 2020, 4:29pm UTC](https://discourse.processing.org/t/calculate-something-written-in-a-string/24977 "2020-10-28T16:29:02Z")

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I’m currently writing a programm to solve equations. I have the following Problem: My equation will be in the form of a string. What I need is some kind of method to do something like. String calculation="5×(4+1\*3)";…

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## [Processing library equivalent to p5's "Play" library?](https://discourse.processing.org/t/processing-library-equivalent-to-p5s-play-library/24973)

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**Author:** [@SheCurvesMobius](https://discourse.processing.org/u/SheCurvesMobius)\
**Replies:** 0\
**Last updated:** [October 28, 2020, 3:23pm UTC](https://discourse.processing.org/t/processing-library-equivalent-to-p5s-play-library/24973 "2020-10-28T15:23:54Z")

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Hi all, I’m wondering if Processing has a library that has similar functionality to p5’s play library? (The Play library contains functions that make collision, sprite animation, and mouse events much, much faster) Tha…

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## [Color Gradient in Stroke](https://discourse.processing.org/t/color-gradient-in-stroke/24910)

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**Author:** [@Ladan](https://discourse.processing.org/u/Ladan)\
**Replies:** 4\
**Last updated:** [October 28, 2020, 1:05pm UTC](https://discourse.processing.org/t/color-gradient-in-stroke/24910 "2020-10-28T13:05:46Z")

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Hello! Is there any way, I can make a color gradient in the stroke of a button?

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## [Help: How can I make this generator pause and resume between random videos?](https://discourse.processing.org/t/help-how-can-i-make-this-generator-pause-and-resume-between-random-videos/24881)

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**Author:** [@malani](https://discourse.processing.org/u/malani)\
**Replies:** 4\
**Last updated:** [October 28, 2020, 10:39am UTC](https://discourse.processing.org/t/help-how-can-i-make-this-generator-pause-and-resume-between-random-videos/24881 "2020-10-28T10:39:04Z")

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Hi all! I’m working on a random video generator that imitates TV with the mouseClicked to switch through the “channels”/videos. I am aiming to make it so that even if you aren’t on the “channel”, it still plays in the b…

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## [Need help with these codes! (array)](https://discourse.processing.org/t/need-help-with-these-codes-array/24940)

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**Author:** [@BettyBai](https://discourse.processing.org/u/BettyBai)\
**Replies:** 2\
**Last updated:** [October 28, 2020, 4:59am UTC](https://discourse.processing.org/t/need-help-with-these-codes-array/24940 "2020-10-28T04:59:53Z")

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please format code with \</\> button \* homework policy \* asking questions My teacher is asking us to use Array and for loop functions to draw the same image many times. I tried to create new arrays for different variab…

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## [Cant get sequence of images to save](https://discourse.processing.org/t/cant-get-sequence-of-images-to-save/24630)

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**Author:** [@DeadMusik](https://discourse.processing.org/u/DeadMusik)\
**Replies:** 7\
**Last updated:** [October 28, 2020, 4:26am UTC](https://discourse.processing.org/t/cant-get-sequence-of-images-to-save/24630 "2020-10-28T04:26:07Z")

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Hello, so I picked this code up off the net, its not mine but after doing some tweaks I was trying to get it to save images so I could upload into after effects, can you please tell me where I need to put my if statement…

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## [Smooothing out Z height with sin()?](https://discourse.processing.org/t/smooothing-out-z-height-with-sin/24959)

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**Author:** [@DeadMusik](https://discourse.processing.org/u/DeadMusik)\
**Replies:** 0\
**Last updated:** [October 28, 2020, 3:47am UTC](https://discourse.processing.org/t/smooothing-out-z-height-with-sin/24959 "2020-10-28T03:47:14Z")

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Hello I have a sketch here I got watching the great Dan S. , I altered his Perlin noise terrain with some color now I want to be able to get the terrain to smooth out after going into the more extreme levels of z height.…

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## [Different Paint tools for color picker](https://discourse.processing.org/t/different-paint-tools-for-color-picker/24931)

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**Author:** [@kasper1](https://discourse.processing.org/u/kasper1)\
**Replies:** 6\
**Last updated:** [October 27, 2020, 10:44pm UTC](https://discourse.processing.org/t/different-paint-tools-for-color-picker/24931 "2020-10-27T22:44:02Z")

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Hello everyone I am a beginner and I am trying to make four different drawing tools (one of them is a simple draw tool, i.e. dragging the mouse pointer draws pixels in the selected color; the other three tools could be, …

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## [Random position of class objects](https://discourse.processing.org/t/random-position-of-class-objects/24950)

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**Author:** [@MaxMax](https://discourse.processing.org/u/MaxMax)\
**Replies:** 3\
**Last updated:** [October 27, 2020, 9:13pm UTC](https://discourse.processing.org/t/random-position-of-class-objects/24950 "2020-10-27T21:13:39Z")

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Hi, I managed to make my player ( the car ) collide with the obstacles that are falling down. I tried to make a class so I would be able to make the position, speed, and size of each obstacle random. But it doesn’t work …

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## [Get non sketch active focused window size and position possible?](https://discourse.processing.org/t/get-non-sketch-active-focused-window-size-and-position-possible/24944)

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**Author:** [@mrmatthewfelton](https://discourse.processing.org/u/mrmatthewfelton)\
**Replies:** 2\
**Last updated:** [October 27, 2020, 2:25pm UTC](https://discourse.processing.org/t/get-non-sketch-active-focused-window-size-and-position-possible/24944 "2020-10-27T14:25:53Z")

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Hi. I’m super new to processing 3. is it possible to find the the size and position of an active window. by that I mean whatever window is currently the main focused and active window ? just need to know if its possible …

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## [Initial state of vector (or array?), I do not understand](https://discourse.processing.org/t/initial-state-of-vector-or-array-i-do-not-understand/24897)

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**Author:** [@raboytniksings](https://discourse.processing.org/u/raboytniksings)\
**Replies:** 7\
**Last updated:** [October 26, 2020, 11:33pm UTC](https://discourse.processing.org/t/initial-state-of-vector-or-array-i-do-not-understand/24897 "2020-10-26T23:33:10Z")

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I have just discovered Processing and so far it is extremely addictive and fun! I want to create two “droplets” of points, one near the top and one near the bottom of the visible space, but for some reason I do not unde…

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## [Minim help for changing speed for Sampler](https://discourse.processing.org/t/minim-help-for-changing-speed-for-sampler/24684)

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**Author:** [@justin\_lincoln](https://discourse.processing.org/u/justin_lincoln)\
**Replies:** 2\
**Last updated:** [October 26, 2020, 11:26pm UTC](https://discourse.processing.org/t/minim-help-for-changing-speed-for-sampler/24684 "2020-10-26T23:26:03Z")

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Hi folks, I’ve been trying to build a midiDrum program for a while now. I got the pads to work with AudioSamples but I just switched to using UGens so that I can apply effects and change the speed of the samples. This co…

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## [Cursor clipping mask](https://discourse.processing.org/t/cursor-clipping-mask/24934)

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**Author:** [@pescemc](https://discourse.processing.org/u/pescemc)\
**Replies:** 0\
**Last updated:** [October 26, 2020, 8:44pm UTC](https://discourse.processing.org/t/cursor-clipping-mask/24934 "2020-10-26T20:44:51Z")

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Hello, I need to create a program like the one in the video that I leave below, it is about 2 overlapping images, with a clipping mask in a circular shape handled by the mouse, which shows the outside of one image, and i…

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